/*
 * Copyright 2007 Zhang, Zheng <oldbig@gmail.com>
 * 
 * This file is part of ZOJ.
 * 
 * ZOJ is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either revision 3 of the License, or (at your option) any later revision.
 * 
 * ZOJ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with ZOJ. if not, see
 * <http://www.gnu.org/licenses/>.
 */

package cn.edu.zju.acm.onlinejudge.action;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessages;

import cn.edu.zju.acm.onlinejudge.bean.request.LogCriteria;
import cn.edu.zju.acm.onlinejudge.form.LogSearchForm;
import cn.edu.zju.acm.onlinejudge.util.AccessLog;
import cn.edu.zju.acm.onlinejudge.util.PerformanceManager;
import cn.edu.zju.acm.onlinejudge.util.Utility;

/**
 * <p>
 * ShowDashboardAction
 * </p>
 * 
 * 
 * @author Zhang, Zheng
 * @version 2.0
 */
public class ShowDashboardAction extends BaseAction {

    /**
     * <p>
     * Default constructor.
     * </p>
     */
    public ShowDashboardAction() {

    }

    /**
     * ShowRolesAction.
     * 
     * @param mapping
     *            action mapping
     * @param form
     *            action form
     * @param request
     *            http servlet request
     * @param response
     *            http servlet response
     * 
     * @return action forward instance
     * 
     * @throws Exception
     *             any errors happened
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form, ContextAdapter context) throws Exception {

        ActionForward forward = this.checkAdmin(mapping, context);
        if (forward != null) {
            return forward;
        }

        LogSearchForm searchForm = (LogSearchForm) form;
        if (searchForm.getTimeStart() == null) {
        	searchForm.setTimeStart(Utility.toTimestamp(new Date(System.currentTimeMillis() - 24 * 3600 * 1000)));
        }
        ActionMessages errors = searchForm.check();
        if (errors.size() > 0) {
            context.setAttribute("logs", new ArrayList<AccessLog>());
            return this.handleFailure(mapping, context, errors);
        }
        int page = Utility.parseInt(context.getRequest().getParameter("page"));
        if (page < 0) {
            page = 1;
        }
        int logsPerPage = 20;

        LogCriteria criteria = searchForm.toLogCriteria();

        List<AccessLog> logs =
                PerformanceManager.getInstance().searchLogs(criteria, (page - 1) * 20, logsPerPage,
                                                            searchForm.getOrderBy());

        context.setAttribute("parameters", searchForm.toParameterMap());
        context.setAttribute("page", page);
        context.setAttribute("logsPerPage", logsPerPage);
        context.setAttribute("logs", logs);

        return this.handleSuccess(mapping, context, "success");

    }

}
